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Extracorporeal power supply with a wireless feedback system for an implanted medical device

a technology of wireless feedback and power supply, applied in the field of medical devices, can solve the problems of inefficient use of battery power in the open loop system and excessive energy being furnished to the implanted device, and achieve the effect of sufficient electrical energy

Inactive Publication Date: 2007-07-05
KENERGY INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0013] The extracorporeal power supply includes a source of electrical power, a power transmitter that emits the first wireless signal, a second receiver for the second wireless signal. A feedback controller is connected to the second receiver and the power transmitter and controls transmission of the first wireless signal in response to the second wireless signal. The control of the first wireless signal ensures that sufficient electrical energy is provided to the medical device without wasting electrical power from the source.

Problems solved by technology

However, this resulted in the excessive energy being furnished to the implanted device the vast majority of the time when less power was needed.
The open loop system was an inefficient use of the battery power in the extracorporeal power supply.

Method used

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  • Extracorporeal power supply with a wireless feedback system for an implanted medical device
  • Extracorporeal power supply with a wireless feedback system for an implanted medical device
  • Extracorporeal power supply with a wireless feedback system for an implanted medical device

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Embodiment Construction

[0022] Although the present invention is being described in the context of components for a cardiac pacing system, it can be used to control supplying energy from an extracorporeal power supply to other types of implanted medical devices.

[0023] Initially referring to FIG. 1, a medical apparatus, in the form of a cardiac pacing system 10 for electrically stimulating a heart 12 to contract, comprises an extracorporeal power supply 14 and a medical device 15 implanted in the circulatory system of a human patient 11. The medical device 15 receives a radio frequency (RF) signal from the power supply 14 worn outside the patient and the implanted electrical circuitry is electrically powered by the energy of that signal. At appropriate times, the medical device 15 delivers an electrical stimulation pulse into the surrounding tissue of the patient thereby producing a contraction of the heart 12.

[0024] Referring to FIGS. 1 and 2, the exemplary implanted medical device 15 includes an intrava...

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Abstract

A medical device adapted for implantation into a patient receives electrical power from an extracorporeal power supply. The medical device has a first receiver for a first wireless signal, a power circuit that extracts energy from the first wireless signal to power the medical device, and a feedback signal generator that transmits a second wireless signal indicating a magnitude of energy extracted from the first wireless signal. The extracorporeal power supply includes a source of electrical power and a power transmitter that emits the first wireless signal. A second receiver enables the extracorporeal power supply to receive the second wireless signal. A feedback controller manipulates the first wireless signal in response to the second wireless signal to ensure that sufficient electrical energy is provided to the medical device without wasting electrical power from the source.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS [0001] Not Applicable STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT [0002] Not Applicable BACKGROUND OF THE INVENTION [0003] 1. Field of the Invention [0004] The present invention relates to medical devices that are implanted into the body of an animal, and more particularly to control of electrical power supplied to the implanted medical device from an extracorporeal power supply. [0005] 2. Description of the Related Art [0006] A remedy for people with slowed or disrupted natural heart activity is to implant a cardiac pacing device which is a small electronic apparatus that stimulates the heart to beat at regular rates. [0007] Typically a battery powered pacing device is implanted in the patient's chest and has sensor electrodes that detect electrical impulses associated with in the heart contractions. These sensed impulses are analyzed to determine when abnormal cardiac activity occurs, in which event a pulse generator is t...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A61N1/378
CPCA61N1/3787
Inventor DENKER, STEPHENBULKES, CHERIKBEUTLER, ARTHUR J.
Owner KENERGY INC
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